We offer the Pertronix Vacuum Advance distributor kits with an Ignitor 1 or Ignitor 2 module. The difference is the amount of spark the distributor and coil produce. An Ignitor 1 distributor with a Flame Thrower 1 coil has 3.0 Ohms of resistance and does 40,000 Volts. An Ignitor 2 distributor with a Flame Thrower 2 coil has 0.6 Ohms of resistance and does 45,000 Volts.